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/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*/
/* probe_roms - scan for oem parameters */
#include <linux/kernel.h>
#include <linux/firmware.h>
#include <linux/uaccess.h>
#include <linux/efi.h>
#include <asm/probe_roms.h>
#include "isci.h"
#include "task.h"
#include "sci_controller_constants.h"
#include "scic_remote_device.h"
#include "sci_environment.h"
#include "probe_roms.h"
struct efi_variable {
efi_char16_t VariableName[1024/sizeof(efi_char16_t)];
efi_guid_t VendorGuid;
unsigned long DataSize;
__u8 Data[1024];
efi_status_t Status;
__u32 Attributes;
} __attribute__((packed));
struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
{
void __iomem *oprom = pci_map_biosrom(pdev);
struct isci_orom *rom = NULL;
size_t len, i;
if (!oprom)
return NULL;
len = pci_biosrom_size(pdev);
rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
for (i = 0; i < len && rom; i += ISCI_ROM_SIG_SIZE) {
memcpy_fromio(rom->hdr.signature, oprom + i, ISCI_ROM_SIG_SIZE);
if (memcmp(rom->hdr.signature, ISCI_ROM_SIG,
ISCI_ROM_SIG_SIZE) == 0) {
size_t copy_len = min(len - i, sizeof(*rom));
memcpy_fromio(rom, oprom + i, copy_len);
break;
}
}
if (i >= len) {
dev_err(&pdev->dev, "oprom parse error\n");
devm_kfree(&pdev->dev, rom);
rom = NULL;
}
pci_unmap_biosrom(oprom);
return rom;
}
/**
* isci_parse_oem_parameters() - This method will take OEM parameters
* from the module init parameters and copy them to oem_params. This will
* only copy values that are not set to the module parameter default values
* @oem_parameters: This parameter specifies the controller default OEM
* parameters. It is expected that this has been initialized to the default
* parameters for the controller
*
*
*/
enum sci_status isci_parse_oem_parameters(union scic_oem_parameters *oem_params,
struct isci_orom *orom, int scu_index)
{
/* check for valid inputs */
if (scu_index < 0 || scu_index > SCI_MAX_CONTROLLERS ||
scu_index > orom->hdr.num_elements || !oem_params)
return -EINVAL;
memcpy(oem_params,
&orom->ctrl[scu_index],
sizeof(struct scic_sds_oem_params));
return 0;
}
struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw)
{
struct isci_orom *orom = NULL, *data;
if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0)
return NULL;
if (fw->size < sizeof(*orom))
goto out;
data = (struct isci_orom *)fw->data;
if (strncmp(ISCI_ROM_SIG, data->hdr.signature,
strlen(ISCI_ROM_SIG)) != 0)
goto out;
orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL);
if (!orom)
goto out;
memcpy(orom, fw->data, fw->size);
out:
release_firmware(fw);
return orom;
}
static struct efi *get_efi(void)
{
#ifdef CONFIG_EFI
return &efi;
#else
return NULL;
#endif
}
struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
{
struct efi_variable *evar;
efi_status_t status;
struct isci_orom *orom = NULL;
evar = devm_kzalloc(&pdev->dev,
sizeof(struct efi_variable),
GFP_KERNEL);
if (!evar) {
dev_warn(&pdev->dev,
"Unable to allocate memory for EFI var\n");
return NULL;
}
evar->DataSize = 1024;
evar->VendorGuid = ISCI_EFI_VENDOR_GUID;
evar->Attributes = ISCI_EFI_ATTRIBUTES;
if (get_efi())
status = get_efi()->get_variable(evar->VariableName,
&evar->VendorGuid,
&evar->Attributes,
&evar->DataSize,
evar->Data);
else
status = EFI_NOT_FOUND;
if (status == EFI_SUCCESS)
orom = (struct isci_orom *)evar->Data;
else
dev_warn(&pdev->dev,
"Unable to obtain EFI variable for OEM parms\n");
if (orom && memcmp(orom->hdr.signature, ISCI_ROM_SIG,
strlen(ISCI_ROM_SIG)) != 0)
dev_warn(&pdev->dev,
"Verifying OROM signature failed\n");
if (!orom)
devm_kfree(&pdev->dev, evar);
return orom;
}
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